Full Auto Splitboard Binding

ABSTRACT

A splitboard binding was developed specifically for boots that have toe and heel landings for full auto binding bails. The binding is also designed to interface with splitboard and solid snowboard bolt patterns. The basic components of the design can be broken up into two pieces, the parts that stay with the splitboard at all times, and the parts that are removable, only to be used when the splitboard is being ridden as a snowboard. The basic design of the mechanism is a twist lock motion with two tabs that secure the binding in place.

CROSS-REFERENCE TO RELATED APPLICATIONS

Provisional Application No. 61/701626, filed on Sep. 15, 2012.

BACKGROUND OF THE INVENTION

Back country snowboarding is for those that want to ride a snowboard where there are not lifts. Most snowboarders start riding the back country by carrying their snowboard on their backs and hike in snowshoes. In recent years, a snowboard that is “split” down the middle so it can separate to form two separate ski like parts has become the norm for back country snowboarding. Each half of the board can be fitted with skins to aid in traction for uphill cross-country travel. Once at the top, the two half are then put together to form a snowboard.

Typically snowboarders use a boot that has a fabric shell with a foam liner. Snowboarders like the softer feel and ride that this boot provides, but there are draw back to using a boot like this in the back country. Soft boots are more susceptible to absorbing water, which makes them harder to dry when spending days in the winter wilderness. They break down quickly and the fit changes quickly with use. They are typically designed just for the descent and are too ridged at the ankles for long hikes. When boot crampons are needed, the crampons are difficult to keep in place. When hiking up on firm snow, kicking in steps becomes difficult.

Skiers made the switch to a plastic shell boot years ago. For skiers, the plastic boot is critical for transferring power to the skis and providing a solid connection to the skis. These boots have landings at the heel and toe for interfacing with ski bindings and are also used for boot crampon attachment points. A plastic shell boot is not susceptible to water absorption like soft shell boots, they perform well when kicking in steps and provide a consistence fit for an extended period of usage. However, most ski boots are heavy, too stiff for snowboarding and not designed to flex. In very recent years, ski boot manufactures have begun to make a boot designed specifically for those who want a lightweight boot that articulates when hiking for a more efficient stride but locks out for ski descents. These backcountry specific ski boots have a few draw backs for skiers. They are typically too soft and flex too much when compared to a typical downhill ski boots. However these boots have become boots that are easy to modify for back country snowboarding with one exception, splitboard binding that is specially designed just for these types of boots.

BRIEF SUMMARY OF THE INVENTION

Disclosed here are splitboard bindings designed specifically for plastic shell boots with toe and heel landings along with pivot points at the toe for attachment points for cross-country hiking. The bindings are designed such that the boot and bindings flex to provide an overall feel that snowboarders are used to. The bindings are designed to put the boot as close to the board as possible and provide additional support across the splitboard board halves which improves the rigidity of the splitboard and makes it feel much more like a traditional one piece snowboard.

The bindings are designed to stow when the board is separated and used as cross country skies. Existing ski toe bindings are used to attach the boot to the board halves when cross country skiing. This provides an advantage for long hikes as it reduces the swing weight at the feet.

When the board halves are connected to form a snowboard, the bindings that where stowed for cross country travel are exhumed and twist onto the board cleats mounted to the board halves and lock in place with locking pins imbedded in the binding plate assembly.

BRIEF DESCRIPTION OF SEVERAL VIEWS OF THE DRAWING

FIG. 1 is a plan view of the binding as it would be assembled for ride mode.

FIG. 2 is a plan view of just the board cleats as mounted and the board halves mated for ride mode.

FIG. 3 is a plan view of just the board plates as mounted and the board halves mated for ride mode.

DETAILED DESCRIPTION OF THE INVENTION

FIG. 1 illustrates the binding as it would be assembled for ride mode. The binding plate assembly 1 is comprised of the one binding plate 11, the two bail block 2, the locking pin system 3 and the bails (not shown). To remove the binding plate assembly 1, the lever 3 is actuated in the open position and the pin 4 retracts. When this is done for both sides, the binding plate assembly can rotate in either direction and will then detach once the lower tab on the binding plate 11 is clear of the locking tab 5. Also shown on this figure is the side profile of the lever 8.

When the binding is positioned as seen in FIG. 1, the boot sole rests on the top of the bail blocks 2 and the levers 3 are not able to be actuated. This ensures that the locking pins 4 cannot retract while riding.

FIG. 2 illustrates the board cleat assembly 207 as it would be assembled for ride mode and the binding plate assembly not attached. The splitboard centerline 206 is horizontal to the view. The board cleat assembly 207 is comprised of the locking tab 200, the board plate 201 and the top washer 202. The locking tab 200 is adjustable in +/−15 degree increments for each position and can be reposition to achieve greater angles. Machine screws mount through the holes on the top washer 205 and thread into the lower board plate 201. The V-slot 204 in the locking tab 200 is the receiving surface for the locking pin when the binding plate assembly is attached and secured.

FIG. 3 illustrates the board plates 100 as it would be assembled for ride mode with the splitboard halves mated. The splitboard centerline 106 is horizontal to the view. The first step to assembling the binding is to mount the board plates 100 to the splitboard. The machined slots 101 on the board plates 100 are spaced apart to provide rider stance width adjustability. Once the board plates 100 are secured to the board, the other components shown in FIG. 3 can be mounted. Each of the two board plates 100 are mounted to each half of the splitboard. When the splitboard halves are mated together, part of the board plates 100 overlap each half of the board. This is by design and creates a more ridged board feel. The board plates 100 have two stops to aid in the alignment of the two board halves 104 and 103. Once the board halves are aligned, the board halves cannot slide past each other because of the stop 104. However, the board can slide back apart unless the binding plate assemble is mounted and then the binding plate assembly interfaces with the other stops 105. The board plate 100 has threaded holes 102 for the machine screws that hold the locking tab to the board plate 100. Only two of the seven threaded holes are used at any one time. To achieve different foot angles, various threaded holes can be used.

Various manufacture techniques can be employed to make each of the various components. The component shown in FIG. 1 are typically laser cut from a flat sheet of aluminum or stainless steel and then countersinks, slots and other machining operations are performed. 

1. The binding plate assembly rests directly on the top of the splitboard and thereby the force exerted by the rider's foot is transmitted directly to the top of the board.
 2. The binding is designed to flex in the roll direction while providing a stiff response in the toe to heel direction.
 3. The binding rotates on and off to secure the binding to the board.
 4. The binding is held in place via a locking pin with an over center lever
 5. The plate binding stows for cross country travel.
 6. The binding is designed to mount directly to a splitboard or a solid single piece snowboard
 7. The binding has stops to aligning the board half when the two board halves are mated together to form a snowboard
 8. The board plates are designed to overlap onto the other half of the splitboard and thereby providing additional rigidity
 9. The bail blocks are designed to be independently adjustable for various foot cants, elevations and boot sizes.
 10. The binding is designed to be angularly adjustable by repositioning the locking tab and securing it on smaller adjustments.
 11. When engaged, the locking pins provide a force to bring the two board halves together.
 12. Except from the binding plate, there are no loose components when transitioning between cross country travel and snowboard mode. 